Gapped gear.



W. T. SEARS.

GAPPBD GEAR.

APPLICATION FILED AUG.22,1910.

9K9@ i v l Patented Mar. 28, QM,

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GAPPED GEAR.

APPLICATION FILED AUG. z2, 1910.

98%923@ Mmm@ Mar.28,1911.

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WILLARD T. SEARS, 0F PHILADELPHIA, PENNSYLVANIAASSWNQE 'EQ NlLES-BEMENTcarica.

com) COMPANY. or JERSEY Gira-raw amasar.

l GAPPED GEAR.v

` vaiiia, have invented certain new and useful Improvements in GappedGears, of which the following is a specification.

This invention pertains to gears provided with a gap extending throughthe riiii and inwardly, such gears being frequently einployed in carwheel lathes designed for the turning of car wheels while on theiraxles, portions of the driving apparatus, including a gapped gear,surrounding the axle between the Wheels.

The invention relates to the system for inoving the patch which opensand closes the gap in the rim laterally to the plane of the gear. Bylaterally to the planeof the gear I mean in a direction contrary to orat an angle to the plane .of the gear, and

it- Will be-uiiderstood that I have illustrated in the drawings only oneof several constructions Which may be employed to ,swing the patchlaterally to the plane of the gear.

Figure l is a side view of a gapped gear` exeniplifying my invention,the patch being in closed position; and Fig. 2 is a. View of the frontedge, the right-hand edge of Fig. 1, of the gear, the patch beingshownin open position, and the closing cani being shown in section in acurved plane concentric with the axis of the gear.

To avoid confusion in delineation no teeth are shown in the gear in Fig.2, and in Fig. 1, the teeth have been oniittedvat the patch and itsneighborhood.

ln the drawings :-1,\indicatcsj the riin of the gear: 9., its hub: 3,the gap extending through the riin and inwardly, the gap, at the riin,having a convexupper Wall and a concave lower wall, the curvature ofthese walls being struck from a common center: 4, the patch adapted tobridge the gap at the riin, the patch having upper and lower surfaces tofit the curved surfaces of the Walls at the gap of the rimzv, a shaftmounted in the gear with its axisat right anglesto and above the axis ofthe gear, this shaft forming a hinge on which the patch inay swing intoand out of the kgap: 6, an arm projecting from 'the patch and secured tothe shaft: '7, a counterweight secured to the Shaft, oppositejthe patchand adapted to specification of Letters raient. Patented Mar., 2S,191i." Application led August 22, 191C. Serial No, 578,265.

' serve in counterbalancing it, theA body of thegear being provided withan opening through which this counterweiglit may swing: 8, a latch-leverpivoted tothe gear. osite the side tol on the side of the gap 'op 9ivhiclithe patch is hinget .fthe outer end of this latch-lever takinginto a notch in .the d Y, inner lower portion of the patch when the.

patch is in closed position: 9, a spring acting on the latch-,lever and.urging it 'to iatehing position in the patch: 10, a cam-arm coiinectedwith ythe latch-lever: v11, a' iied pin or projection in the path of thecainarin and" adapted, as the gear turns in counter-clock Wisedirection, to engage thecain-arin and release the latch-lever: 12, arecess in the `rear of the patch' to lighten the patch andpe'irnit ofthe vemployment of' a lighter Counteriveight: 13, the innermost portionof the patch, the sameengaging Within the riin of the gear and havingarin 6 projecting from it: and 14, a fined cani presenting itself nearthe side `of the gear and adapted, as thec gear revolves inconnter-clockwise direction, to be engaged by the open patchrand forcethe patch to closed position. i

in F ig. 1, assuming the gea-r to be turning i in counter-clockwisedirection, the patch 'is `in closed position and the latch Vis on thepoint of release. The instant it is released the counterweight swingsoutward and swings the patch laterally out of the gap leaving the entiregap open, at which time, of course, the rotation of the gear is to bearrested, leaving matters in the condition -liave the gap open at eachturn of the gear.

I claini:-- I 1. A gapped gear comprising, a gear provided with a gapextending through its rini and inwardly, the walls of the gap atatie"riin being concentric arcs, a patch haifi'ng.

concentrically curved upper and lower surfaces adapted to t andbridgethe gap in the rini, a hinge-axis carried by the gear at right angles tothe axis of the gear, an arm hingng the patch to said axis, and meansfor swinging the patch into and out of the gap, combined substantiallyas set ifortli.

9,. A gapped gear comprising, a gear provided with a. gap extendingthrough its rim and inwardly, the walls of the gap at the riin beingconcentric arcs, a patch having coneentrically curved upper and lowersurfaces adapted to lit and bridge the gap in the riin, a .hinge-axiscarried by the gear at right angles to the axis ofthe gear, an arnihing-ing the patch to said axis, nicans for swinging the patch into andout of the gap, a latch to lock` the patch in closed position, andineans for releasing said latch, combined substantially as set forth.

3. A ,gapped gear comprising, a'gear provided with a gap extendingthrough its rini and inwardly, the Valls of the gap at the '20 rinibeing cmicentric arcs, a patch haying coneentrically curved upper andlower surfaces adapted to tit and bridge the gap in the rnn, ahinge-axis carried by. the gear at right angles to the axis of the gear,an arni hingiiig the patch to said axis, means for swinging the patchinto and out of the gap,

a latch to lock the patch in closed position,

and a fixed projection iii the path of a part of the latch to serve inreleasing the latch as the gear turns, combined substantially as setiorth.

4. A gapped gear con'iprising, a gear providedwith a gap extendingthrough its riin and inwardly, the wallsci the gap at the rini beingconcentric arcs, a patch having coneentrically curved upper and lowersnriaces adapted to fit and bridge the gap in the riui, a hinge-axiscarried by the gear at right angles to the axis of the gear, an armhingiiig the patch to said axis, a counter weight connected with thepatch, and means for swinging the patch into the gap, coinliinedsubstantially as set' forth. i

5. A gapped gear comprising, a gear provided with a. gap extendingthrough its riin and inwardly, the Walls of the gap at the riai losingconcentric ares, a patch having concentrically curved upper and lowersur faces adapted to Ht and bridge the gap in the riin, a. hinge-axiscarriedby the gear at right angles to the axis o" the gear, an armhinging the patch to said axis, a counter- 'weight connected w'ith'thepatch and adapted to sci-ve in swinging the patch to open position, anday fixed cani adapted to engage the patch when in 'open position andforce it to closed position while the gear turns, c0m hint-dsubstantially as set forth. A

G. A gapped gear comprising a gear provided with a gap extending throughits rim and inwardly,` a pat-cli adapted to fit and bridge the gap inthe rirn, said patch being arranged to swing laterally to the plane ofthe gear, and n'ieans for swinging the patch into and out oi? the gap.

WILLARD T. SEARS.

Witnesses R.- Harmon lfon'rnn, @nannies W. AiansoN.

